EMI baffle for electronic control

Abstract

An electronic control module includes an EMI baffle in the form of openings formed in laterally spaced portions of the cold plate supporting the electronic circuits. Preferably, upper and lower plates of the cold plate define a limited access baffle chamber with openings that require rerouted travel of any leakage radiation emanated by terminals or conductors carried by couplers inserted into the cold plate openings or passing through the openings. Preferably, each coupler is inserted through openings having an inlet axis in the cold plate and the module packaging covers are secured to the cold plate between an inlet and an outlet opening in the cold plate. Accordingly, simple gaskets may be used to seal the covers against the cold plates and the couplers against the cold plate. Moreover, the cold plate coolant passage has inlets and outlets that remain exposed exteriorly of the covers to avoid exposure of the internal circuitry to leakage.

What is claimed is: 
     
       1. An electronic control module package for a plurality of electrical circuits comprising: a cold plate having at least one first lateral surface area carrying at least one circuit of said plurality of circuits and an opening laterally spaced from said first area and extending into said cold plate;   an electrical coupler including at least one conductor carried in a plug body, said plug body being dimensioned to be received in said opening;   a first cover defining a chamber disposed over said first surface area and having a side wall positioned between said laterally spaced opening and a second opening in said cold plate communicating with said chamber.   
     
     
       2. The invention as defined in claim 1 wherein said laterally spaced opening comprises a plurality of openings and said electrical coupler comprises a plurality of plug bodies corresponding in number to the number of openings. 
     
     
       3. The invention as defined in claim 2 wherein said openings are defined by circular openings in said cold plate wall. 
     
     
       4. The invention of claim 1 wherein said laterally spaced opening has an inlet axis, and wherein said second opening has an outlet axis aligned at an angle to said inlet axis. 
     
     
       5. The invention as defined in claim 4 wherein said cold plate defines a conductor path by a wall of said cold plate aligned at an angle to said inlet axis. 
     
     
       6. An EMI baffle for electronic control modules having a plurality of circuits mounted on a cold plate within a housing cover, said baffle comprising: a laterally extended portion of said cold plate, said extended portion having an opening in the cold plate, said opening being peripherally defined by a peripheral edge in the cold plate outside the confines of said housing;   an electrical coupler comprising at least one conductor and a plug body insulated from said conductor, said plug body being dimensioned to be received in said opening in engagement with said peripheral edge independent of said housing;   a first housing cover portion covering said opening and said plug body on one side of said cold plate, said plug body exposing said at least one conductor externally of said housing on the opposite side of said cold plate from said first housing cover portion.   
     
     
       7. The invention as defined in claim 6 wherein said opening comprises a plurality of openings and wherein said plug body comprises a plurality of plug bodies corresponding in number to the number of openings. 
     
     
       8. The invention as defined in claim 7 wherein said plug bodies are mounted on at least one plate. 
     
     
       9. The invention as defined in claim 7 wherein each said opening is defined by circular openings in said cold plate. 
     
     
       10. An EMI baffle for an electrical connector of a control module for a battery powered vehicle including high power connectors and low power connectors, the control module having high power and low power control circuits carried by a cold plate within a housing, the baffle comprising: an opening in said cold plate laterally offset from the high power and the low power circuits;   an electrical coupling carrying conductors for said high power control circuits and said low power control circuits, each of said conductors extending through at least one plug body dimensioned to fit within said opening and insulated from said conductor, wherein said opening has an inlet axis and communicates with a second opening having an outlet axis offset from said inlet axis.   
     
     
       11. The invention as defined in claim 10 wherein said offset comprises said inlet axis being aligned at an angle to said outlet axis.